Lifestyle
Forget flowers: These ancient plants attract pollinators by getting hot
Beetles (Rhopalotria furfuracea) visit a male cone of the cycad plant Zamia furfuracea, whose cones produce heat during pollination.
Michael Calonje
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Michael Calonje
Some of the earliest plants attracted pollinators by producing heat that made these plants glow with infrared light, according to a new set of experiments.
The work, published in the journal Science, suggests that long before brightly colored flowers evolved, these ancient plants would metabolically rev themselves up when they had pollen at the ready. Nocturnal insects such as beetles could then see that heat from afar and home in on the target.
These heat-producing plants, called cycads, exist today in tropical forests around the world, although they’re one of the most endangered plant groups.
“Some people call them dinosaur plants because they were much more dominant when the dinosaurs were around,” says Wendy Valencia-Montoya, a cycad expert at Harvard University.
Fossils from over 200 million years ago, compared to cycads that exist today, show that “the plants look exactly the same,” she says. “So they haven’t changed much in hundreds of millions of years.”
They’re related to pines, and male and female plants each produce fleshy, pine-cone-like structures that contain the pollen and the seeds. “That’s something very unique among this group of ancient plants,” says Valencia-Montoya, who says these are the oldest known plants that have pollen.

A couple of centuries ago, botanists noticed that these plants produced heat in their reproductive structures. Compared to the ambient air temperature, they can be hotter by 15 to 25 degrees Fahrenheit, or even more.
“We think of producing heat as something that mammals do, or birds do, but in fact, plants can do it too,” she says, although it’s not common in the plant world and takes a lot of energy.
In these plants, the heat was thought to be a byproduct of metabolic processes. Or, maybe the heat volatilized the scent of the plant, much like plugging an air freshener into an electrical outlet to generate heat that sends scent around a room. Research done in the last couple of decades has shown that male and female cones heat up at slightly different times, which could send pollinators moving from one cone to the other.
To try to understand more about what was going on, Valencia-Montoya and her colleagues painted some pollinating beetles with fluorescent markers to watch when the beetles went to the plant. And they found that the beetles were clearly going to the plant cones when they heated up.
This thermal image shows two male cycad cones releasing pollen. This plant’s cones heat up during pollen-release.
Wendy Valencia-Montoya
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Wendy Valencia-Montoya
To decouple the heat from other potential signals that these plants produce, like scent and humidity, her team used 3-D printing to make some simulated pollen cones. These fake plant structures were hollow inside, and got filled up with heated sand.
The fake cones glowed in the infrared much like real plants. “It was quite striking, when we saw it in the field,” says Valencia-Montoya, who says the fake plants were deployed outside at the Montgomery Botanical Center in Coral Gables, Florida.
Using these fake plants, the researchers figured out a couple of tricks to see if insects were attracted to the infrared glow, rather than the tactile sensation of heat itself. For example, in one experiment, they wrapped the cone with plastic wrap that is transparent to infrared light. Insects could see the infrared light but not get close enough to the cone to actually feel the heat.

What they found is that the infrared glow, by itself, was enough to attract hundreds of pollinating beetles.
And when they looked at those beetles, they found that they have specialized antennae that have evolved to detect slight differences in temperature — similar to the heat-sensing receptors used by snakes to detect prey.
What’s more, it turns out that the beetles’ antennae seem to be tuned to the exact temperature range deployed by their host plant, since different beetle species frequent different cycad species.
“Infrared radiation is perhaps the oldest discovered pollination signal,” says Nicholas Bellono of Harvard University, one of the authors of the new study.
Back when plants first evolved pollen, the insects that were around were nocturnal and had poor vision, says Valencia-Montoya. “So it makes a lot of sense that a signal like heat was guiding them.”
But as new groups emerged that were active in the day and had better vision, like butterflies and bees, “it makes more sense for plants to change their signaling strategy to also tap into the sensory systems of these more recent pollinators,” she says, adding that in evolution, there’s a constant dance back and forth between plants and their pollinators. Once color became a possible signal, flowering plants had an immense range of color combinations at their disposal, allowing them to rapidly diversify.
These researchers used “a powerhouse of techniques” to prove that the temperature of cycad’s heat-producing cones is intimately related to attracting pollinators, and that this association is ancient, says Roger Seymour, with the University of Adelaide in Australia, who wasn’t part of the research team: “This is an important contribution.”
Seymour thinks that heat could have more than one role, however, and the chance for a warm-up may be a bonus for beetles that require high body temperatures for activity. “Heat can be a direct energy reward to insect pollinators which may remain inside a thermogenic flower for much longer than insects visiting non-thermogenic species,” he says.
Irene Terry at Tthe University of Utah, an ecologist who specializes in cycads and their insect interactions but wasn’t part of this research team, says it’s only been relatively recently that people realized these ancient plants even had pollinators, rather than just spreading their pollen with the wind.
Particular odorants seem to be important pollinator attractants, she says, noting that these plants can smell like everything from bubblegum to bell peppers. Still, this study shows “in the most beautiful way” that infrared is also key.
“I was not surprised at all that infrared was involved,” says Terry, given that other insects like mosquitoes use infrared to find their way to a target. “There’s a range of things that insects can see that we don’t.”
Imagine, says Bellono, being a prehistoric beetle trying to navigate the darkened environment in the early evening, and seeing various plants start to glow red.
“The infrared is an entirely different world that we don’t experience,” he says. “I think that’s a cool thing to think about, going back in time, that this signal was around when the dinosaurs were there, long before us. And the beetles still use it to this day and are still experiencing that world.”
Lifestyle
Jewelry Among the Exhibits at a Daniel Brush Retrospective
Nearly four years after his death, a retrospective of the multidisciplinary work by the self-taught American artist Daniel Brush — encompassing sculpture, paintings and jewelry in materials as diverse as steel, Bakelite and gold — is scheduled to open June 8 at the Paris location of L’Ecole, School of Jewelry Arts.
“Daniel Brush: The Art of Line and Light” will be the fifth time that L’Ecole has exhibited the artist’s work. But its president, Lise Macdonald, said she believed Mr. Brush’s legacy warranted repeated consideration: “He is a very niche artist, but he is excellent — really one of the greatest artists of the 20th and 21st century.”
The diversity of his creations has been part of his appeal, she said. “We don’t really consider him as purely a jeweler but more a protean artist where jewelry was part of his approach.”
L’Ecole Paris, which operates in an 18th-century mansion in the Ninth Arrondissement and is supported by Van Cleef & Arpels, has prepared programming to complement the show, from conversations with experts on Mr. Brush’s work (to be held on site and streamed online) to jewelry-making workshops for children. Details of the free exhibition and the events are on the school’s website; the show is scheduled to end Oct. 4.
The exhibition is to include more than 75 pieces, which span much of Mr. Brush’s five-decade career. They have been selected by Olivia Brush, his wife and collaborator, and by Vivienne Becker, a jewelry historian and author who said she first met the couple more than 30 years ago. Some exhibits, they said, have never been seen by the public before.
Ms. Becker, who wrote the 2019 monograph “Daniel Brush: Jewels Sculpture,” said the artist had possessed vast knowledge of the history of jewelry and shared her belief that jewels “answer a very important, very basic human impulse to adorn — that it’s essential to customs, beliefs, and ceremonies around the world.” She also has written a book documenting the L’Ecole exhibition — and with the same title — that examines the artist’s preoccupation with the themes of light and line.
“He loved the idea of making a real, intransigent, opaque metal into something that was almost translucent, or transparent,” said Ms. Becker, citing as an example a trio of bangles made in 2009 to 2010 that are called the “Rings of Infinity.” The lines that he engraved on the aluminum pieces functioned, she explained, to “elevate the jewel from a trinket to a great, great work of art.”
A series of engraved steel panels titled “Thinking About Monet” used the interplay of line and light to achieve a different effect, she said. Mr. Brush made individual strokes in tight formation on the panels, producing gently rippling surfaces whose color changes with shifting light conditions.
The effect “is really hard to understand. I couldn’t,” Ms. Becker said. “So many people ask, ‘Are they tinted? Are they colored?’ It’s absolutely nothing. It’s just the breaking of the light.”
Though Mr. Brush was a widely acknowledged master of skills such as granulation, the application of tiny gold balls to a metal surface, both Ms. Brush and Ms. Becker said the exhibition’s goal was not to highlight his virtuosity — nor, Ms. Becker said, was that ever a concern of Mr. Brush’s. “He didn’t want to talk about the technique at all,” she said. “Technique has to just be a means to an end. He just wanted people to be amazed, to have a sense of wonder again.”
The works selected for the L’Ecole exhibition reflect his range, which veered from diamond-set Bakelite brooches inspired by animal crackers to a steel and gold orb meant to be an object of contemplation. “He didn’t want to have boundaries,” Ms. Brush said. “He wanted to do what he wanted to do when he wanted to do it.”
The couple met as students at what is now called Carnegie Mellon University in Pittsburgh, and her 1967 wedding ring was the first jewel that Mr. Brush made.
All of Mr. Brush’s works were one-of-a-kind creations, completed from start to finish by him in the New York City loft that served as a workshop as well as a family home. Photographs of the space, which contained a library with titles on the eclectic subjects that preoccupied him — Chinese history, Byzantine art, Impressionist painting — and the antique machinery that inspired him and that he used to make his tools, are featured in the exhibition and reproduced in Ms. Becker’s book.
Ms. Brush is a fiber artist in her own right, but Mr. Brush also frequently credited her as an equal participant on pieces bearing his name. “I did not physically make the work,” she explained, “but the work would not have evolved or happened the way it did if it were not for the way we lived our lives,” she said.
Lifestyle
Thanks to ‘Mormon Wives,’ Dirty Soda Is a National Obsession
The first time Pop’s Social, a catering company in South Orange, N.J., that specializes in dirty soda, served an alcoholic drink at an event, something strange happened.
At the event in December, its nonalcoholic offering, a spiced pear-cider seltzer with vanilla and peach syrups, cream, lemon and cold foam, was a hit. The Prosecco-spiked version? Not so much.
“People were more interested in the mocktail than the cocktail,” Ali Greenberg, an owner of the business, said in an interview.
Dirty soda — a customizable blend of soda, flavored syrup, creamer and sometimes fruit, served over pebble ice — has been crossing into the mainstream for years, especially after the cast of “The Secret Lives of Mormon Wives,” the hit reality show that premiered in 2024, frequented Swig, the Utah chain that started it all.
But its reach has gone far beyond the Mormon corridor, and its rise in popularity has dovetailed with an overall decline in U.S. alcohol consumption. “There’s not a lot of Mormon people in our neighborhood,” said Greenberg. “But there are a lot of people who are sober-curious or not drinking.”
The reality show, which follows a group of Mormon influencers in Utah, helped popularize dirty soda beyond the Mountain States and inspired a wave of TikTok videos on the subject. Swig rapidly expanded — growing from 33 locations in Utah and Arizona in 2021 to now more than 150 locations in 16 states — along with other Utah chains, and spawned copycats nationwide.
Dirty soda has joined other Mormon cultural exports, like tradwife influencers, a “Real Housewives” franchise in Salt Lake City and Taylor Frankie Paul, the Bachelorette who wasn’t, that have captivated America.
With the recent rollouts of dirty soda at McDonald’s, Chick-fil-A and Dunkin’ — behold the Dunkin’ Dirty Soda: Pepsi, coffee milk and cold foam — and the appearance on grocery shelves of Dirty Mountain Dew and a coconut-lime Coffee Mate creamer for homemade dirty sodas, we may have reached peak dirty.
The idea for dirty soda came out of a desire for members of the Church of Jesus Christ of Latter-day Saints, which has millions of followers in Utah and surrounding states, to have more options for social drinking, as the church prohibits the consumption of alcohol, hot coffee and hot caffeinated tea.
When Swig introduced dirty soda in 2010, it filled a need, providing a pick-me-up for car-pooling moms and an after-school treat for their kids. It was quickly adopted by many in the community.
“In other cultures, parents go, they pick up their coffee in the morning, and for me and for a lot of my other friends’ parents, it was, ‘Let’s go pick up our dirty soda,’” Whitney Leavitt, a breakout star of “Mormon Wives,” said in an interview.
Leavitt was surprised when her dirty soda order became a recurring question from reporters in recent years. “They were so excited to hear all of the different syrups and creamers that we add to our drinks to make whatever your go-to dirty soda is,” Leavitt said. (Hers is sparkling water with sugar-free pineapple, sugar-free peach and sugar-free vanilla syrups, raspberry purée, a squeeze of lime, and fresh mint if she’s “feeling really fancy.”)
In April, Leavitt became the chief creative and brand officer at Cool Sips, a beverage chain based in New York that sells dirty sodas.
“Mormon Wives” inspired Kaitlyn Sturm, a 26-year-old mother of three from Jackson, Miss., to post recipes for dirty sodas on her TikTok. The one she makes the most contains Coke or Dr Pepper, homemade cherry syrup, a glug of coconut creamer and a packet of True Lime crystallized lime powder, which she combines in a pasta-sauce jar filled with pebble ice. “It kind of has become like a ritual, where I make one for my husband as well, and we have it most evenings,” Sturm said in an interview.
The trend has also hit fast-food menus. The new “crafted soda” menu at McDonald’s is riddled with dirty soda DNA. The Dirty Dr Pepper, with vanilla flavoring and a cold-foam topper, is the chain’s version of what has shaped up to be the universal dirty soda flavor. Since 2024, Sonic, beloved for its porous, soda-absorbing pebble ice, has offered “dirty” drinks — your choice of soda plus coconut syrup, sweet cream and lime.
These drinks might feel new, but there are antecedents in the Italian sodas of the ’90s (fizzy water and a pump of Torani syrup); the Shirley Temple (ginger ale or lemon-lime soda with grenadine and maraschino cherries); and the egg cream, a tonic of seltzer, chocolate syrup and milk. And what is a dirty Dr Pepper with cold foam if not a descendant of the root beer float? “It’s just a soda fountain from 125 years ago,” Kara Nielsen, a food and beverage trend forecaster, said in an interview.
Though Leavitt moved to New York City with her family in December, her dirty soda ritual has remained consistent, with one key difference. “In Utah, we don’t get to walk to dirty soda shops,” Leavitt said. “We have to drive there.”
Lifestyle
Chaos Gardening: A Laid-Back Way to Garden
Annuals include flowers like marigolds and nasturtiums. They grow fast but won’t come back the next spring (though they will drop seeds and possibly propagate). Perennials like lavender and sage will return year after year, but they may take longer to grow. Wildflower and pollinator packets often contain both annual and perennial seeds but are frowned upon by some serious gardeners, because the selection can be haphazard and ill-suited to the area.
It’s a good idea to exercise a little situational awareness. How much rain can you expect? How much sunlight? Dig the earth and feel it between your fingers — is it sandy? Loamy? These are things to keep in mind as you prepare for your journey into horticultural chaos.
“You want to prepare your soil, your site, at least a little bit,” said Deryn Davidson, a sustainable landscape expert at Colorado State University Extension in Longmont, Colo. “Try to get rid of weeds. Make sure the soil is ready to receive seeds.”
Davidson, who has written about chaos gardening, strongly advised covering the seeds with a layer of soil, lest they become bird food. As for watering, that depends on where you live, she added. On the whole, though, the formula is straightforward: “Soil, sun and water is what these seeds need,” Davidson said.
Not everyone is a fan of the trend, or at least the way it has been portrayed on social media. “Nature is not chaos — nature is pattern,” said Robin Wall Kimmerer, a botanist and the author of “Braiding Sweetgrass,” which recommends imbuing modern life with Indigenous wisdom.
“It seems unrealistic,” Kimmerer said of the chaos gardening videos she has watched. The feeling of effortlessness they convey — a common social media effect, almost always the result of deft editing — seems to elide the work that goes into a garden, whether chaotic or not, she suggested.
“I want my garden to be natural and biodiverse,” she said. “That’s a good impulse. I don’t think this technique is going to get you there, but that’s an important impulse.”
Boitnott, the maker of the viral video, offered a simple reason for why chaos gardening has become popular: “It just makes you happy.”
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